backpack definition

A knapsack, usually mounted on a lightweight framework, which worn on your right back, concerning carry camping materials.

a bit of gear, often containing life-support devices, designed to be properly used while becoming continued the rear: a parachute in a backpack; an astronaut's backpack.

A knapsack, occasionally attached to a light framework, but constantly supported by straps, worn on a person’s back for the purpose of holding things, especially when walking, or on a student's when holding publications.

A similarly put item containing a parachute or other life-support gear.